Elevator.



No. 65|,562. Patented lune I2, |900.

y C. M. BARTHDLO'MEW.

E L E V A T'0 R.

(Appncaeion maa .my 2 9, 1899.

2 Sheets--Sheet 2.

(No Model.)

A TTUHNEYJ/ OASSIUS M. BARTHOLOMEVV,

STATES arnNfr nuten,

OF OOLUMUS,OIIIO, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO VILLIAMF. LEONARD AND TOLLEN F.

KIRKPATRICK, OF SAME PLACE.

ELEVATOR.v

SPECIFICATION forming part of Letters Patent No. 651,562, dated J' une12, 1900. Application filed July 29, 1899. Serial No. 725,467. (Nomodel.)

To all wil/0711, it may concern:

Be it known thatI, CAssIUs M. BARTHOLO- MEW, a citizen of the UnitedStates, residing at Columbus, in the county of Franklin and State ofOhio, have invented certain new and useful Improvements in Elevators;and I do hereby declare the following to be afull,clear, and exactdescription of the invent-ion, such as will enable others skilled in theart to which Io it appertains to make and use the same.

In passenger-elevators many accidents occur through a tardy or prematureoperation of the door or through undue haste of passengers to get intoor out of the car regardless of whether the carisin motion. In somecases when the motor apparatus is faulty and the operator hastemporarily absented himself from the car the car will automaticallydrop away from the landing,involving trouble zo and danger.

One object of my present invention is to provide improved mechanismwhereby the door cannot be opened until the car has been stoppedproperly at the landing and whereby z 5 the car cannot be moved toanother floor until the door has been closed; and, further, it is myobject to provide means whereby the car cannot move any considerabledistance from a landing in the absence of the operator.

3o In the annexed drawings, in which I have shown one embodiment of myinvention, Figure l is a vertical sectional view of an elevator-shaftand a car therein equipped with an embodiment of my present invention.

Fig. 2 is a view in elevation looking from the exterior of the shafttoward the door thereof, showing the door closed; but the door-closinglever is in the position to which it is thrown by the movement orpassing of the car. Fig.

4o 3 is a view in perspective, parts being broken out to show cams forautomatically controlling at a floor the motor-controlling lever. Fig.-i is a perspective view illustrating in detail the door-closing leverand door-latchiug devices. Fig. 5 is a perspective view illustrating indetail, on a scale larger than that of Fig. 1, the parts operated by themotor-controlling lever. Fig. 6 is a perspective view illustrating indetail the devices for wilh- 5o drawing the door-closinglever from theclosed door.

On t-he several views like characters of reference mark correspondingparts.

1 designates the walls of an elevator-shaft, 2 a sliding door suspendedon rollers for closing an opening from the floor into said shaft, and 3a car or carriage to move in said shaft.

`In the instance shown the apparatus for operating the door 2 comprisesa weighted cord l2, attached to the upper portion of the door andpassing over a pulley in the side of the shaft, said weighted cordtending to pull the door to its open position, and a lever 5, pivotedinthe floor and furnished with a spring 5, tending to close the door.Attached to the lever 5 is one end of a cord b,while the other end ofsaid cord is attached to block 5, sliding on a bar 5, arrangedvertically at the side of the shaft. The cord 5" passes between a pairof stationary rollers 5', so that if the sliding block 5 be drawn up ordown from it-s middle or normal position the lever 5 is removed from thedoor and the weighted cord left free to pull'the door open as. soon asunlatehed, as hereinafter explained. It may be herek stated that aspring for the lever of greater power than the Weighted cord isemployed, so that normally the door is held closed. The devices formoving the block 5 consist of two boot-shaped dogs 6, pivoted on theouter side of the car, said dogs having springs 6 to hold their toesnormally protruded, so that they shall strike the block 5c and carry itup or down, according to the directionin which the car is moving. Inorder that the dogs may belibera-ted from the block 5c when the leverhas been drawn the re-` quired distance from the door, a bar 7, hav-ying cam projections 7, is arrangedin the elevator-shaft parallel to thepath of the motion of the dogs, so that the cam projections7 shall acton studs 6 to draw the dogs from engagement with the block.

Arranged in the shaft adjacent the lever 5 is a frame S, having ahorizontal portion 8, provided with a notch S", (see Fig. 4,) into whicha pivoted pawl 5f on the lever 5 drops to hold the lever in itswithdrawn position. (See Fig. 2.) In this frame also is arranged a bar9, having at its end near the door-opening an elongated eye 9, intowhich projects the end of a bell-crank lever 10, constituting IOO 111and a spring 11" a latch that is journaled in the floor near the cornerof the door-opening, so that when said bar 9 is moved toward thedoor-opening the latching end of said crank-lever will be raised to abutagainst a shoulder on a bar 2b, extending across the door to prevent theopening of the door, and when said rod 9 is moved in the oppositedirection the said latching end shall be lowered and permit the openingof the door. The opposite end of the rod 9 is furnished withroller-studs 9b, for the purpose hereinafter explain ed, and withagravitydog il, the upper end of which is formed to lift the pawl 5f outof the notch 8" when the rod 9 is moved toward the door.

The elevator-car is shown to be provided with an ordinary handled leverl1 for controlling the motor that operates the car; but this lever haslongitudinally movable upon it a bar 11, with a laterally-projecting pinconnecting a handle 11ll on bar l1 with the lever 11, so that said pinis normally depressed. The handle 11 extends through a longitudinal slotin the lever 1l. By taking the handle of the lever and the handle of thebar 11n in the hand the pin llb can be raised or lowered at will.

Secured to the wall of the eievator-car adjacent the motor-controllinglever 11 and in a plane parallel to the plane of oscillation of the saidlever is a plate 12, having a slot 12 concentric with the fnlcrum ofsaid lever; but the wall of said slot is open at its upper side, asindicated at 12b, such opening being located opposite that positiouofthe pin 1lb when the motorcontrolling lever is in position for stoppingthe operation of the motor.

Pivoted to the wall of the car at the left of the plate 12, as seen inFig. 1, is a bell-crank lever 13, having pivoted to the end of its upperor horizontal arm a link 13, having a closed slot, preferably concentricwith the Slot 12, in which projects and remains the pin 1lb. Thevertical or dependent arm of the bell-crank lever 13 is bifurcated tostraddle a pin 14: on a horizontally-sliding bar 14:, arranged on thewall of the car below the plate l2. This plate carries avertically-arranged bar 14;, having its ends beveled or pointed. Thisbar 149 is placed to stand beyond the side of the car, and its path ofinotion lies between the roller-studs 9b on the bar 9.

Pivoted in the door of the car between the lever 1l and plate 12 is abar 15, havinga recess or notch 15a at its upper end. The bar 15 ispivoted, so as to oscillate in a plane parallel to the plane ofoscillation of the motor-controlling lever, and its recess 15 coincideshorizontally with the slot 12n in the plate 12. Therefore When the pin1lb, and with it the link 13, is depressed, so that the pin rests in therecess 15, the leverll and the bar 12 oscillate together, the said pinmoving in the slots of both the lilik and plate. The pin 11b cannot,therefore, be let into or removed from said recess until lever 1l isbrought to its motor-stopping position-tl1at is, until the ing 12b.

To hold the bar 15 normally, but yieldingly, with its recess 15 underthe opening 12", itis linked by means of arod l5",of properlength, tothe end of a spring 15C, secured under the Hoor of the car, the bent endof the rod pass ing through a slot 3 in the tloor of the car. (See Fig.3.) Connected to this bent end of the rod 15b is the arm of a bell-cranklever 15d, while the other arm of the bell-crank lever has its endprotruding beyond the side of the ear. fulcrumed horizontally to theunder side of the car, as seen in Fig.

Secured to the side of the elevator-shaft, so as to lie in the path ofmotion of the protruding end of the bell-crank lever l5, are camblocks16. These blocks are arranged one a little above and the other a littlebelow the plane of the iioor, so that their adjacent camsuriaces whenacting on the end of the bellcrank lever 15l shall throw the lever 15(and also lever 11 when connected therewith) to a position to reverse orstop the motor.

In connection with the bell-crank lever 13 there is employed a devicefor automatically locking the same while the car is in motion,comprising a bolt 17, upon which is aspringsupported collar17, adaptedto be depressed bythe centrifugal action of balls 17", whirled bythelooped portion 1S of fixed cord 1S, passing through the car, said loopedportion running over stationary pulleys 19, fixed to the side of thecar, and around a pulley 17, to which the balls are hinged. This bolt 17and the centrifugal device are supported in a bracket 20, secured to thewall of the car, so that the bolt shall be thrown into a recess in thebell-crank lever 13 to lock said lever in the running position of thepa1ts-tl1at is, when the link 13 is raised and the door latched-and drawthe bolt 17 from the recess when the ear is at rest.

The operation, which may be readily understood by those skilled in theart from the foregoing description, is as follows: Letit be supposedthat the car shown in Fig. 1 is ascending. In this case the upper dog 6will strike the block 5c and draw the door-closing lever 5 totheposition indicated in Fig. 2, where it will be held by the engagement ofthe pawl 5f with the notch 8l. After the dog G is withdrawn from theblock 5C by the cam 7iL the block may drop by gravity to the positionindicated in Fig. 2. By moving the lever 11 to the middle of the link 13the car can be stopped at the landing, and when so stopped the bolt 17is ot' course withdrawn from the notch in the lever 13. Then byreleasing the handle 11d the pin 1l" drops into the notch 15, the lever13 throwing the bars 14 and 9 to the left as viewed in Fig. 1, andconsequently the latch 10 down, allowing the weighted cord to draw thedoor open. In this position of the parts the operating-le- Thisbell-crank lever is also bestV pin is brought opposite the open- IOO IIO

ver 11 is free to be oscillated; but the car cannot be moved anyconsiderable distance either above or below the landing because of thecam-blocks 16, which will automatically re verse the operating-lever.Therefore in order to move the car to a landing above or below the pin11b must be lifted entirely outof the slot 12, and this lifting carrieswith it the link 13, and therefore throws the bar 9,with its gravity-dog9c, to the. right as viewed in Fig. 1, thus lifting the latching-pawl 5fof the lever 5 and allowing said lever to close the door; 'but the pin11b cannot be lifted entirely out of the slot 12 until the door isclosed, because of the contact of the latch with the bar 2b, so that itwill be impossible to put the car in motion to take it to a floor aboveor below until the door is entirely closed and latched. It will be notedthat after the pin 11" has been lifted out of the notch 15 the lever 15is free to be oscillated by either of the cams 16 without affecting themotoroperating lever11 and that at all times, except when affected bysaid cams 16, the lever 15 is held by the spring 150, so that its notch15 stands directly under the opening` 12b.

What I claim, and desire to secure by Letters Patent, is-

l. In combination with an elevatoreshaft, a door in an opening to saidshaft, means for automatically opening the same, a device for latchingsaid door in closed position, a carin said shaft, means on the car foroperating said latching device, and a governor on the car operated bythe motion of the car to lock the door-latch-operating devices,substantially as described.

2. In combination with an elevator-shaft, a carin said shaft, a door inan opening to said shaft, means for automatically opening the same, adevice for latching the same in closed position, 'means on the car foroperating said latching device, and means on the car operated by themotion of the car to lock the door-latch-operatin g devices while thecar is in motion and unlocking said lock when the car stops,substantially as described.

3. In combination with an elevator-shaft,

a carin said shaft, a door in an opening to said shaft, means forautomatically opening the same, a device for latching the same in closedposition, means on the car for operating said latching device, a lockoperated by the motion of the car to 'lock the door-latchoperatingdevices, a motor controller and means on the motor-controller foroperating the door-latch-operating devices when the car has stopped,substantially as described.

4. In combination with an elevator-shaft, a car in said shaft, a door ata landing to said shaft, devices in the car for controlling the motorfor said car, cams 16 arranged in said shaft, a device 15 arranged to beactuated by said cams, and means for connecting and dis connecting themotor-controller and the device 15, substantially as described.

5. In combination with an elevator-shaft a car to move in said shaft, adoor in an opening to said shaft, means for automatically opening thesame, adevic'e vfor latching the same in closed position, means on the car for operating said latchngdevice, a motor-controlling device in saidcar, cams 16 arranged in said shaft, a device 15 arranged to be actuatedby said cams, means on the motor-controller for actuating` thedoor-latch-operating devices and connecting said motor-controller withthe device 15, substantially as described.

6. In combination with an elevator-shaft, a car to move in said shaft, adoor in an opening to said shaft, means for automatically openingthesame, a device for latching the same in closed position, means on thecar for operating said latching device, a motor-controller in said car,cams 16 arranged imsaid shaft, a device 15 arranged to be actuated bysaid cams, means on the motor-controller for actuating thedoor-latch-operating devices, and means for permitting the connection ofthe motor-controller with the device 15 only when the motor-controllerhas been brought to stopping position, and permitting the operation ofthe same after the connection has been made, substantially as described.

7. In combination, an elevator-shaft and a car to move therein, a doorin an opening to said shaft,'a weighted cord to open the same,

a preponderating device for closing the d0or,-

means operated by the car for entirely disengaging said preponderatingdevice from action on the door, and means in the shaft for holding thesame so disengaged, a latch for holding the door closed, means foroperating the same, means in the car for releasing the door-closingdevice and restoring the doorlatch to its latching position, amotor-controller in the car, a device thereon for operating the meansfor releasing the door-closin gand latch-restorin g devices,substantially as described.

8. In combination, an elevator-shaft and a car to move therein, a doorin an opening'to said shaft, a weighted cord to open the same, apreponderating lever for closing the door, means operated by the car fordisengaging said lever from action on the door, and means in said shaftfor holding the same so disengaged, a latch for holding the door closed,means in the car for releasing the door-closing lever and restoring the'door-latch to its latching position, a motor-controlling device in thecar, and a device for operating the means for releasing the door-closingand latch-restoring devices, substantially as described.-

9. In combination with an elevator-shaft,

and a car to move therein, a door in an open-v ing to said shaft, meansfor opening the door and preponderating means lfor closing the door, alatch for holding the same closed, means operated by the motion of thecar to relieve the door of the action of the closing IOO IOS

device, a motor-controller in said car, a device on said controlleroperative in the stopping position only of the said controller torelease the door-latch, and means compelling the restoration to actionof the door-closing device and the restoration of the latch to latchingposition prior to the movement of the car away from said door,substantially as described.

10. In combination with an elevator-shaft, a door in an opening to saidshaft, means for automatically opening the same, a latch for holding thedoor closed, a carin said shaft, a motor-controller in said car, meansin the car for operating the latch, a device on the motor-controller foractuating the means for operating the latch, and means to prevent theoperation of the said device until the motorcontroller is brought tostopping substantially as described.

position,

2O l1. In an elevator mechanism of the kind described, the combinationof a motor-controlling device 1l, a movable pin 1lb thereon, a. plate 12with a slot motor-stopping position of ver 15, a spring l5, and lever15d, a link-connecting lever 15 and the spring and lever 15", and cams16 to actuate the lever 15d, substantally as described.

12 open only at the the pin' 11", a le- 25 In testimon i whereof I aiixm i sifnature o in presence of two witnesses.

CASSIUS M. BARTHOLOMEVV.

Witnesses:

GEORGE M. FINCKEL, GEORGE W. ALFRED.

